Crosshead shoe or the like



March 4, 1941. L, RlCl-LmgsQN 2,233,457

OSSHEAD SHOE OR THE LIKE Filed March '7, 1939 2 Sheets-Sheet l may/x Amig March 4, 1941. L RlCHA'RDsON 2,233,457

CROSSHEAD SHOE ORTHE LIKE "-e---n-k /4 v I K Y Patented Mar. 4, 1941 y UNITED STATES PATENT OFFICE CROSSHEAD SHOE R THE LIKE Lawrence Richardson, Melrose, Mass.`

Application March '7, 19.39', Serial No; 260,423 6 Claims. (Cl. 308-'-3.)v

This invention relates to that class of machine movement, preferably being positioned with one elements which in use oppose some mating suredge abutting against and overhung by the opface and in consequence of the relative motion posed undercut wall, as illustrated at the exresulting from the conditions of use are subject treme right in Fig. 2. Between the bevelled edge to wear, usually more rapid in the element itself at ythe left and the opposing wall a substantial 5 than on the cooperating surface, which in time clearance vmay thus exist. produces an excessive clearance between the interposed between the bottom of the recess parts which must be eliminated by a replaceand the we-ar plate I0 I provide means for poment or reconditioning of the worn part. An sitioning the plate as such in any one oi' anumber lo outstanding example of such class is the crossof positions spaced from the bottom. Con- 1 head of a steam locomotive wherein the moveveniently these take the form of small bowed ment is a sliding movement of the head along springs I6. It is tobe noted thatthese springs the crosshead guide, and the operating surface of are not relied upon to support the wear. plate thel crosshead, which frequently is formed of I0 against the thrust ofthe connecting rod, but

some relatively soft, anti-friction metal, wears are of 'adequate strengthto support the weight of 5 away relatively rapidly. The object ofthe inthe plate as such and it may be brought to a devention is to provide an inexpensive and 'efficient sired position of adjustment by pressing it inconstruction for such an element capable of a Wardly against the resistance of the springs. simple readjustment to compensate for wear. To maintain the plate in the desired position, l My invention will be well understood byrefer- Babbitt metal. I8 or similar readily fusible maence to the following description of an illustratei'lalV which will melt at a temperature suintive embodiment thereof taken in connection ciently low as not `to be destructive of the springs with the accompanying drawings wherein I have or harmful to the other parts may be flowed shown by way of example a crosshead shoe leminto the recess I2 to fill the same to underlie the bodying the' invention. In these drawings: plate and to imbed the lower part of it. The 5 Fig. 1 is a Vertical section through a portion of metallls the clearance shown at the left hand a, locomotive crosshead shoe; of the plate in Fig. 1 and inteIlOCkS the plate Figs. 2 and 3 are sections on the lines 2--2 and with the overhanging portion of the recess wall 3--3 of Fig. 1, respectively; and adjacent the same. It interlocks with the re- 30 m Fig. 4 is a transverse section illustrating a stage lieved or bevelled margins .of the plate, with the in the process of rehabilitating. the shoe. undercut wallsA of the recess as a whole, and with Referring to the drawings, I there show a the' auxiliary recesses Ill herein provided in the crosshead shoe of generally channeled form havbase.

ing the web portion 6 which opposes the cross- We may suppose Fig. 1 to represent the crosshead guide and the flanges 8 which embrace the head' shoe as prepared initially for use. In use sides thereof. The greaterl part of the wear the'plates l0 wear away and ultimately will reon the shoe is on the face thereof opposing the quire readjustment. To recondition the shoe it guide. To take this wear I have shown the botmay be positioned with the channel up, as shown tom or web portion ofthe channel as fitted with in Fig. 4, and a plate 20 secured across the flanges 4U wear plates l0, which may, for example, be of 8. Spacing blocks 22 are interposed between the 40 bronze, and provide means for securely and rigidplate 20 and the wear plates I0, the height of ly positioning them while permitting their ready these blocks corresponding to the desired disreadjustment (downwardly in Figs. 1 and 2) to tance between the wearing faces of the wear compensate for wear. 'I'o receive each plate the plates I0 and the extremities of the channeled web portion of the shoe may be provided with flanges 8. Thus in Fig. 4 we may suppose that 45 a recess I2. Herein this recess is of generally the plate I0 originally extended to a position dovetailed form, being undercut at least at the corresponding to the bottom ends of the blocks fore and aft ends, as illustrated in Fig. 1, and the 22 and that the clearance illustrated in the iigbottom of the recess may be provided with auxure illustrates the wear which has occurred in use 5 iliary undercut recesses I4. The plate I0 may and which it is desired to compensate for by 50 have the ends which oppose the undercut ends of adjustment. The parts being ini the position the recess correspondingly relieved by bevelling shown in Fig. 4, heat may be applied to melt them toward they outer or wearing face of thevthe fusible filling metal I8, releasing the plate plate. The plate is of such length that it may' to the springs I6 which automatically elevate it be inserted in the recess by a simple buttoning to the desired position determined by the spacers 55 22. Additional babbitt may then be poured in to fill the space within the recess thus created, and when the babbitt sets, the face of the plate is repositioned in the same position that it originally had when new. l

It Will be noted that the smooth surface of the plate worn by use into close-fitting relation to the guide is preserved unaltered and merely readjusted in position. No machining is necessary.

To facilitate the application of the Babbitt metal I8 I have herein (Fig. 3) shown the lateral margins of the plates l0 as cut away to form gates 24 into which the metal may be poured.

I am aware that the invention may be einbodied in other specific forms without departing from the spirit or essential attributes thereof,` and I therefore desire the present embodiment to be considered in all respects as illustrative and not restrictive; reference being had to the appended claims rather than to the foregoing description to indicate the scope of the invention.

I claim:

1. A machine element having a wear plate car- 2. A machine element having a wear plate carried thereby for bearing on Ia surface of a cooperating element to take thev wear incident to relative movement of the parts, springs under-4 lying the plate and a body of metal fusible at a temperature sufficiently low not to be destructive of the springs or plates, embedding the lower portion of the plate and securing it to the carrying element in a position determined by the compression of the springs.

3. A machine element having a Wear plate carried thereby for bearing on a surface of a cooperating element to take the wear incident to relative movement of the parts, said carrying element having a recess in the face thereof opposing the cooperating element, the walls o-f which recess present overhangingv parts, the wearing plate being received in the recess and having projecting portions adjacent the inner side thereof, means adapted to support the plate as such in a plurality of positions relative to the bottom of the recess while maintaining a clearance between the plate and the walls o-f therecess and metal fusible at a temperature substantially lower than the melting point of the plate filling the recess and embedding the inner portion of the plate, the metal entering beneath the overhanging partsand extending over the pro- Vjecting parts.

element havingv an undercut recess in the face thereof opposing' the cooperating element, the wearing plate having sides relieved at the outer face thereof, which sides oppose undercut walls of therecess, the plate being of a dimension to Ybe inserted and positioned therein with a clearance of at least one of said sides from the adjacent wall, means adapted to support the plate from the bottom of the recess in a plurality of positions while maintaining a clearance between the plate and the walls of the recess, and metal fusible at a temperature substantially lower than the melting point of the plate filling the recess, embedding the inner portion of the plate and entering the clearance.

5. A machine element having a wear plate carried thereby having an exposed surface for bearing on a surface of a,` cooperating element to take the wear incident to'relative movement of the parts, means adapted to support the plate as such in a plurality of positions relative to said first element to regulate its clearance from the cooperating element, such means defining a space between said member and the lower portion of the plate, and a body of metal fusible at a temperature substantially lower than the melting Y point of the plate embedding the lower portion of the plate and securing it to its carrying element independently of support by said positioning member.

6. A machine element having a wear plate carried thereby having an exposed surface for bearing on a surface of a cooperating element to take the wear incident to relative movement of the parts, means adapted to support the plate as such in a plurality of positions relative to said rst element to regulate its clearance from the cooperating element, such means defining a space between said member and the lower portion of the plate, the carrying element having an undercut recess and a body of metal fusible at a temperature substantially lower than the melting point of the plate filling said recess and embedding the lower portion of the plate and securing it to its carrying element independently 

